diff --git a/plinth/modules/mldonkey/tests/test_functional.py b/plinth/modules/mldonkey/tests/test_functional.py
index c6fe54db8..1a439a37d 100644
--- a/plinth/modules/mldonkey/tests/test_functional.py
+++ b/plinth/modules/mldonkey/tests/test_functional.py
@@ -6,7 +6,7 @@ Functional, browser based tests for mldonkey app.
 import pytest
 from plinth.tests import functional
 
-pytestmark = [pytest.mark.apps, pytest.mark.mldonkey]
+pytestmark = [pytest.mark.apps, pytest.mark.mldonkey, pytest.mark.sso]
 
 
 @pytest.fixture(scope='module', autouse=True)
diff --git a/plinth/modules/searx/tests/test_functional.py b/plinth/modules/searx/tests/test_functional.py
index cf35c60b7..74f952c91 100644
--- a/plinth/modules/searx/tests/test_functional.py
+++ b/plinth/modules/searx/tests/test_functional.py
@@ -6,7 +6,7 @@ Functional, browser based tests for searx app.
 import pytest
 from plinth.tests import functional
 
-pytestmark = [pytest.mark.apps, pytest.mark.searx]
+pytestmark = [pytest.mark.apps, pytest.mark.searx, pytest.mark.sso]
 
 
 @pytest.fixture(scope='module', autouse=True)
diff --git a/plinth/modules/security/tests/test_functional.py b/plinth/modules/security/tests/test_functional.py
index 356d3f12d..80b2e8f66 100644
--- a/plinth/modules/security/tests/test_functional.py
+++ b/plinth/modules/security/tests/test_functional.py
@@ -6,7 +6,7 @@ Functional, browser based tests for security app.
 import pytest
 from plinth.tests import functional
 
-pytestmark = [pytest.mark.system, pytest.mark.security]
+pytestmark = [pytest.mark.system, pytest.mark.essential, pytest.mark.security]
 
 
 @pytest.fixture(scope='module', autouse=True)
diff --git a/plinth/modules/syncthing/tests/test_functional.py b/plinth/modules/syncthing/tests/test_functional.py
index f72bfd1d5..e5ce13e00 100644
--- a/plinth/modules/syncthing/tests/test_functional.py
+++ b/plinth/modules/syncthing/tests/test_functional.py
@@ -8,7 +8,7 @@ import time
 import pytest
 from plinth.tests import functional
 
-pytestmark = [pytest.mark.apps, pytest.mark.syncthing]
+pytestmark = [pytest.mark.apps, pytest.mark.syncthing, pytest.mark.sso]
 
 
 @pytest.fixture(scope='module', autouse=True)